Apparatus for molding belts



Feb. 28, 1933. E. MEYER 1,899,393

APPARATUS FOR MOLDING BELTS Filed March 22. 1929 JHUETYZUE 551-1552 1 5 E}? i the; mold, and the worktherein, duringythe,

' operationof assembling the jwork .andthe' Patented. Feb. 23, 9 3 1' ArrAnArns Fort iro'LnIitd'ai hTs Application med March 22, 1929;}sefi51 m; 349,212.5

This invention' relatesrto apparatus for w moldingbelts, and more especially'to multiple sectional molds for concurrentlylshaping' and vulcanizing axpluralityof endlessbelts or rings of rubberized fibrous m the rings are under tension. 1

Thechief obj ectof the inventionis to V Vide an" improved mold for thepurpose mentioned which'will shapeall faces of the belt. A more specific. object istoavoid the useof fabric wrappers with moldsfor endless belts. V

" the bottommold'section13 ismountedupon Of the accompanying drawing; l I

struc- F g. 1 is a side elevation-of a mold tureembodying my invention initspreferred form, and the work thereinr a part being;

broken away anda part being insection.

Fig. 2 is aplan'view of. the mold. I Fig. 3 is a fragmentary sectionalview of mold sections.

, Fig. 4 is a modification ofniy improved mold structure.

Referring to the drawing, the mold com-, :prises a'tubular axial member; or mandrel 10- upon the outer. periphery of whichis mount- 7 ed a series of annular mold sections-11, 11 of identical construction; andtop and bottom mold sections 12;13 respectively, all ofsaid mold sections engaging the mandrel 10 with a sliding fit. Eachof the mold sections 11; and section 13 has a.circumferential cavity.

, or recess 14 formed at the juncture of its'inner peripheral face andoneofitsadjoining lateral faces, and the opposite lateral faces-of the sections 11 andtheadjacentface of the V section=l2 are formed respectively with'mold-,

'ing faces 15. The arrangement is such that when the mold sections 11,112,,13are mounted in laterally abuttin relation" upon theax'ial j'. mandrel 10 they de nea 'plurality of "closed, annular, four sided molding cavities. Each.

' of the mold sections 10, 11, 12is formed ex;

tions to remove vulcanized articles there- ;fr0m. I V As shown in Fig. f the drawing, the work;

ternally at opposite sidesrwith radial lugs 16, ,16 which permit the application of 21181111 able tool for separating the respective seccomprises'rings17, 17 of fabric and unvulaterial while i i fply'of rubberized fabric thereon."The rings canized rubber which may formed in I Suitable e u e o w i preeabiycomprises, --as-here shown, a, body structure; 1 of plies of flexible material having substam tial tensile strength and a wrapper or-cover 17 may be rectangular, in cross-sectionas. shown. The finished beltsor rings formed; by the molding and'vulc'anizing of the rings l 17are shown at 17a',17a, Fig.1. r i

Inthe voperation ofmy improved mold,

the man'drel'lO atone end thereof. Unvul f canized' rings- 17' under longitudinal tension and mold sections 11 are mounted thereon inf alternation, as shownin Fig; 3, andlastly the top mold section 12'is mounted upon thej mans d rel. The assembled] structure is] then" mounted'in avulcanizingpress (notxshown), I

7o forcibly close the mold, as illustrated in Fig. 1,1 and the rings are thus molded and vulcanpressure applied to the topmoldsection; to

ized to the desired cross-sectional form while 1 they are held under in the mold cavities.

: Theinvention provides simple apparatus forfull-molding a plurality of rings under tensionin a single mold structure. By obvicircumferential tension g atingtheuse of fabricwrappers with molds of this character, I provide for, uniformity of,

so j:

pressure upon the rings during vulcanization rings. All the molding finsor rands are disposedlongitudinally of. therings so that they readily maybe trimmedtherefrom. The modified structure shown in' Fig. 4

andfuniformity of contour in the finished comprises a tubular mandrellO and aplural. I [ity of ,circums'cribing mold sections, such as.

the, section 11a, which are similar in contour to the. sections .11. of the preferred structure, 1

Each mold section 11a is transversely split at 18, 18, at diametrically.opposite points, and the respective parts of the section arehinged, together at 19, and providedwith a latching device 20 by which said parts may be, secured together to'form an annular structure. The

arrangement facilitates the removal of the mold sections from the mandrel "since they" donot require tobe forced axially of the {Q latter.-

My invention may be otherwise modified within the scope of the appended claim;

I'claim: V 7 Apparatus for molding V-type belts, said apparatus comprising a cylindrical mold member adapted to have a pluralityof belts mounted thereon and a plurality of'armular mold members adapted to be'assembled on said cylindrical mold member in contact in conjunction with the cylindrical member they define a plurality of annular trapezoidal molding cavities.

, In Witness whereof I have hereunto-set my handthis QOth-fday of March, 1929. r

v .I ERNEST MEYER. 

